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a theory predicting how and when we detect the presence of a faint stimulus ("signal") amid background stimulation ("noise"). Assumes there is no signal absolute threshold and detection depends partly on a person's experience, expectations, motivation, and level of fatigue.
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∙ 10y ago
Signal detection theory is a framework used to analyze decision-making in the presence of uncertainty, particularly in the context of detecting a signal (e.g., a stimulus) in the presence of noise. It considers factors such as the observer's sensitivity to the signal and their response criterion. The theory is commonly applied in psychology, neuroscience, and engineering to understand how individuals make judgments in uncertain situations.
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What theory of perception proposes that detection of stimuli depends on a variety of factors?
Signal Detection Theory proposes that the detection of stimuli depends on both the intensity of the stimulus and the individual's psychological factors, such as motivation and expectancy. This theory suggests that perception is influenced by both the sensitivity of sensory processes and cognitive factors.
Which theory emphasizes that personal expectations and motivations influence the level of absolute thresholds?
Signal Detection Theory emphasizes that personal expectations and motivations influence the level of absolute thresholds by suggesting that an individual's sensitivity to a stimulus depends on both sensory factors and decision-making processes. This theory acknowledges that psychological factors such as expectation, motivation, and attentiveness can impact an individual's ability to detect a stimulus.
What is the feature detection theory?
Feature detection theory proposes that complex stimuli are processed by first detecting and analyzing specific features or elements of the stimulus, such as lines, angles, shapes, or colors. These features are then combined to create a perception of the whole stimulus. This theory helps explain how our sensory systems can process and make sense of the vast amount of information in our environment.
What is the theory of balance modulation?
Balance modulation is a theory that proposes the brain prioritizes maintaining postural stability over executing voluntary motor actions by modulating the excitability of muscle groups involved in balancing tasks. This theory suggests that the central nervous system adjusts the level of stability needed based on environmental demands and individual abilities. It is a key concept in understanding how the body regulates balance during various activities.
What does a flag flown upside down signal?
Flying a flag upside down is a signal of distress or danger. It is used as a universal sign of an emergency to seek help or attention.
What theory of perception proposes that detection of stimuli depends on a variety of factors?
Signal Detection Theory proposes that the detection of stimuli depends on both the intensity of the stimulus and the individual's psychological factors, such as motivation and expectancy. This theory suggests that perception is influenced by both the sensitivity of sensory processes and cognitive factors.
What has the author Iickho Song written?
Iickho Song has written: 'Advanced theory of signal detection' -- subject(s): Signal detection
What is a signal detection threshold?
Detection theory allows one to quantify the ability to discern between information bearing patterns and random patterns that causes confusion in the patterns. In electronics, detection theory is often called signal recovery.
What has the author Ralph Dieter Hippenstiel written?
Ralph Dieter Hippenstiel has written: 'Detection theory' -- subject(s): Mathematics, Signal processing, Electronic surveillance, Digital techniques, Signal theory (Telecommunication), Detectors, Signal detection
Which theory emphasizes that personal expectations and motivations influence the level of absolute thresholds?
Signal Detection Theory emphasizes that personal expectations and motivations influence the level of absolute thresholds by suggesting that an individual's sensitivity to a stimulus depends on both sensory factors and decision-making processes. This theory acknowledges that psychological factors such as expectation, motivation, and attentiveness can impact an individual's ability to detect a stimulus.
What does signal detection theory add to the ideas of sensory thresholds?
Signal detection theory applies when signal detection is more important than signal fidelity. Safety is an example of an imperative that will influence whether a sensory threshold is low or high. The penalty of a missed detection vs a false detection. Radar is designed with this in mind. Safety is not the main imperative in all biological systems, where fidelity is more important. C=capacity of channel R=information to be transmitted E=errors When R>C the problem is signal detection, and E are inevitable (see Constant False Alarm Rate) When R<C the problem is signal fidelity (eg internet) and E rate increases as R approaches C.
What does signal-detection theory take into account?
Signal detection theory takes into account the ability to distinguish between meaningful information and random noise in making sensory judgments. It considers both the sensitivity of an individual to detect a signal (discriminability) and their willingness to respond (bias).
What has the author James P Egan written?
James P. Egan has written: 'Signal detection theory and ROC-analysis' -- subject(s): Decision making, Psychometrics, Psychophysics, Sensation, Signal detection (Psychology)
What has the author Harry L Van Trees written?
Harry L Van Trees has written: 'Detection, estimation, and modulation theory' -- subject(s): Signal theory (Telecommunication), Modulation theory, Electric interference, Signal processing, Estimation theory, OverDrive, Nonfiction, Science
Which theory would suggest that watching a horror movie late at night could lower your absolute threshold for sound as you subsequently tried to fall asleep?
signal detection theory
Theory would suggest that watching a horror movie late at night could lower your absolute threshold for sound as you sebsequently tried to fall asleep?
signal detection theory
What is detection of AM?
AM is amplitude modulation. AM detection is the process of demodulation or recovering the information encoded in the signal through amplitude modulation. AM detection can be done through a simple diode detector which rectifies the AM signal.
